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| document type = Letter, Response to Request for Additional Information (RAI)
| document type = Letter, Response to Request for Additional Information (RAI)
| page count = 12
| page count = 12
}}
=Text=
{{#Wiki_filter:V.S.NUCLLABflEGULATOBVCOMMISSIONfIIICr:o>>M1951776Iw"rr~>In~NRCDISTRIBUTIONFOB,P,TGODOCICETMATERIALDOCKETNUMBER50-220FI'NVMOEB'lMr.George'LearFROM:NiagaraMohawkPowerCorp.Syracuse,NewYorkMr,RudolphR.SchneiderDATEOFDOCUMENT8/3/76DATL=RECEIVED8/6/76ABETTERPjjjDBIOINALQCOPVDESCRIPTIONONOTOBIZEDPKVNCLASSIFIEDPROPINPUTFORMENCLOSURENUMBEROFCOPIESRECEIVEDOnesignedLtr,w/attached,;,retheir5/1'9/76ltr,andour6/9/76ltr.~~.furnishingadditionalininformationconcerningAssemblyAveraged'ower-VoidRelationship.TechSpec,-~ACKNOWLEDGEDPLANTNAME:NineMilePointgi(5-P)'ONOTRziMOVZ.SAFETY.ASSXGNEDAD:BRANCHCHIEF:PROJECTMIANAGER:LXC~ASSTo:LearParrishFORACTION/INFORMATIONASSINEDDEPROiNA~LSRE'C'XF'NTERNALDSYSTE'ISSAFETYIS1RlBUTIONSITESA~NRCPDRX&EOEI.DGOSSXCIC&STAFFMIPCCASEIIANAUERJIARLESPROJECTHAVAGFtIENBOYDPCOLLINSHOUSTONPETERSONMELTZ11ELTEMESSKOVIIOLTLPDR:OsweoNY.TXC:.NS,IASLB:ACI<SCYSHe&BBKINBCFof1M166(276)HEXNEIIANSCHROEDERENGXNEERINGifIACCARRY.KNIGHTSIHIPEILPAMLICKIREACTORSAFETZROSSNOVAKROSZTOCZYCHECKAT&XSALTZMANRUTBERGEXTERNALDISTRIBUTIONNllTLABREGSVIELAPDRCONSULTANTS~~?rBENAROYAIPPOLXTO~KIRKICOODOPERATItIGREACTORSOPERATXNrCIEISENHUTSHAOBAERBUTLIRGRIMESWUL'RIKSONORNLENV?.'ROAMASS~??i.NZm~~lf,aaENVSECONTROLNUMiBER7F/B~
NytY~NI~~4~Nt~~~
NIAGARAMOHAWKPOWERCORPORATIONNIAGARA~MOHAWK300ERIEBOULEVARDWESTSYRACUSE,H.Y.l3202August3,1976DirectorofNuclearReactorRegulationAttn:Mr.GeorgeLear,ChiefOperatingReactorsBranchIII3U.S.NuclearRegulatoryCommissionWashington,D.C.20555Re:NineMilePointUnit1DocketNo.50-220DPR-63
==DearMr.Lear:==
Ourletterof'ay19,1976transmittedproposedchangestotheAssemblyAveragedPower-VoidRelationshipTechnicalSpecificationforNineMilePointUnit1.1'ourletterofJune9,1976requestedadditionalinformationregardingthat'roposedchange.Theattachedresponsesaddressthequestionscontainedinyourletter.Sincerely,NIAGARAMOHAWKPOWERCORPORATIONpeg(P~opoS.gangPRudolph.Schneider,VicePresident-ElectricOperationsAttachment
'~<5il'tK'i cRESPOND.STOJUNE9,l976NRCQUESTIONNINEHILEPOINTUNIT1DocketNo.50-220DPR-63RecCuestProvideaquantitativeexplanationof'owexposuredependent"B"valuesarecalculated.Includeexampleswhichshowhowdifferentvaluesof"B"werecalculatedfortwodifferentexposuresofthesamefuel.Theexamplesshouldshow(1)therelationships(equations)assumed,and(2)thesourceandnumericalvaluesofalltermsintherelationshipfor:1.maximumAveragePlanarLinearHeat=GenerationRate(EQPLHGR)andAverageHeatGenerationRate(q)(i.e.,assumedpeakingfactors).2.DryoutTime.(i.e.,h,h.,flow,averagedensity,q).g'n'"3."B"values(i.e.,voidfraction,peakingfactor,power).R~esenseThedurationofnucleateboilingfornon-jetpumpplantECCSanalyseshasbeendeterminedusingthecorrelation(Equation1,below)describedin"GeneralElectricCompliancewith10CFR50AppendixK-AcceptanceCriteriaI.C.4."Thatcorrelationshowsthetimetoboilingtransition(dryouttime)isafunctionexclusivelyofliquidvolumefractionandpowerinputtothebundle.ConvergedHAPLHGRlimitsandconservativeaxialpowerdistributionswereassumedforthedryouttimedeterminations.BothHAPLHGRlimitsanddryouttimesareexposuredependent.Thefollowingdevelopmentshowshow"B"valuesarecalculated.(0~31)(Pf)(hf)gtIIEquation1ht=timetotransitionboiling,hr.3p=saturatedliquiddensity,ibm/fthenthalpyof'aporization,BTU/ibmfggistV(1--a)
(~/q=Poworgenerationinbundle,BTU/hr=(PF)(FCP)(ABTU)PF=bundleradialpowerfactorFCP~fractionalcorepowerrelativeto1850Hh'BTU=averagebundleoutputat1850Hft,BTU/hr3V=activecoolantvolume,fta.=voidfractionThereforeht='0.31)(P)(hf)(V)(1-a.)(ABTU)(PF)(FCP)Equation2"B"Factor=(1-a.)i(PF)(FCP)Equation3~tLimitingthis"B"factorrelatiorishipwillassurethatlocalpowervoidvalueswillnotresultindr@outtimesshorterthanthoseused.intheECCSAnalysis.UsingEquation2:"B"Factor=(ABTU)Qt)(0.31)(Pf)(hf)(V)fgEquation4Assumednominalvaluesare:ABTU=1.1869x10BTU/hr7pf~45.977ibm/ft3hf=641.36BTU/1bmfgV~1.2696ft,ZnitialCoreV=1.2948ft,Reloads1,2,33 r~~
V=1.2936ft,Reloads4,53SubstitutingtheabovevaluesinEquation4yieldsthe"B"factorrelatiori-shipsforthedifferentreloads:"B"Factor=(1022.688)(ht)"B"Factor=(1002.784)(ht)"B"Factor=(1003.714)(bt)2'nitialCoreReloads1,2,3Reloads4,5Equation5Equa,tion6Equation7Thefollovingexamplesshovhovdifferentvaluesof"B"verecalculatedfortvodifferentexposuresofthesamefuel(Reload3):~ExosureECCSAnalsisDroutTimesHAPLHGR50007fVD/T25000HVD/T1.48sec1.59sec10.689.92SunstitutingtheabovedryouttimesinEquation6yields:For5000IWD/T:"B"Factor=(1002.784)(ht)"B"Factor=1002.784lhr)(1.48sec)3600sec/hr"B"Factor=0.412For25000IWD/T:"B"Factor=(1002.784)gt)"B"Factor=(1002.784/hr)(1.59sec)3600sec/hr"B"Factor=0.443
e~eeest:Demonstratehow"B"valuesarecalculatedtoassureconservatismwhenusingthedryouttimesassumedintheECCSanalysis.R~esseeAsindicatedintheaboveresponse,nominalvalueswere.usedtocalculate,the"B"factors.ConvergedHApLHGRlimitsandconservativeaxialpowerdistributionswereassumedfort'edryouttime,determinations.'Inaddition,aconservativec4rrelation(G.E.compliancewith10CFR50,AppendixKcriteriaI.C.4:)wasusedwhichwaspreviouslyapprovedbytheCommission.A"B"FactorLimitingConditionforOperationisnotnecessarytoassurethatactualdryouttimesareconservative.DryouttimeisonlyoneofmanyconservativeinputsusedtodetermineHAPL/EGRlimits,theultimaterestrictionofinterest.Sensitivityanalysesperformedbyourfuelsupplierhavedeterminedthattheparametersusedtocalculatedryouttime(voidfraction,axialpowerdistributions)areconservativewhencomparedtonormalplantoperation.
~r~wy~
}}
}}

Revision as of 11:13, 30 April 2018

Nine Mile Point Unit 1 - Letter Regarding Responses to June 9, 1976 NRC Question
ML17037B543
Person / Time
Site: Nine Mile Point Constellation icon.png
Issue date: 08/03/1976
From: Schneider R R
Niagara Mohawk Power Corp
To: Lear G
Office of Nuclear Reactor Regulation
References
Download: ML17037B543 (12)
v • d • e


Text

V.S.NUCLLABflEGULATOBVCOMMISSIONfIIICr:o>>M1951776Iw"rr~>In~NRCDISTRIBUTIONFOB,P,TGODOCICETMATERIALDOCKETNUMBER50-220FI'NVMOEB'lMr.George'LearFROM:NiagaraMohawkPowerCorp.Syracuse,NewYorkMr,RudolphR.SchneiderDATEOFDOCUMENT8/3/76DATL=RECEIVED8/6/76ABETTERPjjjDBIOINALQCOPVDESCRIPTIONONOTOBIZEDPKVNCLASSIFIEDPROPINPUTFORMENCLOSURENUMBEROFCOPIESRECEIVEDOnesignedLtr,w/attached,;,retheir5/1'9/76ltr,andour6/9/76ltr.~~.furnishingadditionalininformationconcerningAssemblyAveraged'ower-VoidRelationship.TechSpec,-~ACKNOWLEDGEDPLANTNAME:NineMilePointgi(5-P)'ONOTRziMOVZ.SAFETY.ASSXGNEDAD:BRANCHCHIEF:PROJECTMIANAGER:LXC~ASSTo:LearParrishFORACTION/INFORMATIONASSINEDDEPROiNA~LSRE'C'XF'NTERNALDSYSTE'ISSAFETYIS1RlBUTIONSITESA~NRCPDRX&EOEI.DGOSSXCIC&STAFFMIPCCASEIIANAUERJIARLESPROJECTHAVAGFtIENBOYDPCOLLINSHOUSTONPETERSONMELTZ11ELTEMESSKOVIIOLTLPDR:OsweoNY.TXC:.NS,IASLB:ACI<SCYSHe&BBKINBCFof1M166(276)HEXNEIIANSCHROEDERENGXNEERINGifIACCARRY.KNIGHTSIHIPEILPAMLICKIREACTORSAFETZROSSNOVAKROSZTOCZYCHECKAT&XSALTZMANRUTBERGEXTERNALDISTRIBUTIONNllTLABREGSVIELAPDRCONSULTANTS~~?rBENAROYAIPPOLXTO~KIRKICOODOPERATItIGREACTORSOPERATXNrCIEISENHUTSHAOBAERBUTLIRGRIMESWUL'RIKSONORNLENV?.'ROAMASS~??i.NZm~~lf,aaENVSECONTROLNUMiBER7F/B~

NytY~NI~~4~Nt~~~

NIAGARAMOHAWKPOWERCORPORATIONNIAGARA~MOHAWK300ERIEBOULEVARDWESTSYRACUSE,H.Y.l3202August3,1976DirectorofNuclearReactorRegulationAttn:Mr.GeorgeLear,ChiefOperatingReactorsBranchIII3U.S.NuclearRegulatoryCommissionWashington,D.C.20555Re:NineMilePointUnit1DocketNo.50-220DPR-63

DearMr.Lear:

Ourletterof'ay19,1976transmittedproposedchangestotheAssemblyAveragedPower-VoidRelationshipTechnicalSpecificationforNineMilePointUnit1.1'ourletterofJune9,1976requestedadditionalinformationregardingthat'roposedchange.Theattachedresponsesaddressthequestionscontainedinyourletter.Sincerely,NIAGARAMOHAWKPOWERCORPORATIONpeg(P~opoS.gangPRudolph.Schneider,VicePresident-ElectricOperationsAttachment

'~<5il'tK'i cRESPOND.STOJUNE9,l976NRCQUESTIONNINEHILEPOINTUNIT1DocketNo.50-220DPR-63RecCuestProvideaquantitativeexplanationof'owexposuredependent"B"valuesarecalculated.Includeexampleswhichshowhowdifferentvaluesof"B"werecalculatedfortwodifferentexposuresofthesamefuel.Theexamplesshouldshow(1)therelationships(equations)assumed,and(2)thesourceandnumericalvaluesofalltermsintherelationshipfor:1.maximumAveragePlanarLinearHeat=GenerationRate(EQPLHGR)andAverageHeatGenerationRate(q)(i.e.,assumedpeakingfactors).2.DryoutTime.(i.e.,h,h.,flow,averagedensity,q).g'n'"3."B"values(i.e.,voidfraction,peakingfactor,power).R~esenseThedurationofnucleateboilingfornon-jetpumpplantECCSanalyseshasbeendeterminedusingthecorrelation(Equation1,below)describedin"GeneralElectricCompliancewith10CFR50AppendixK-AcceptanceCriteriaI.C.4."Thatcorrelationshowsthetimetoboilingtransition(dryouttime)isafunctionexclusivelyofliquidvolumefractionandpowerinputtothebundle.ConvergedHAPLHGRlimitsandconservativeaxialpowerdistributionswereassumedforthedryouttimedeterminations.BothHAPLHGRlimitsanddryouttimesareexposuredependent.Thefollowingdevelopmentshowshow"B"valuesarecalculated.(0~31)(Pf)(hf)gtIIEquation1ht=timetotransitionboiling,hr.3p=saturatedliquiddensity,ibm/fthenthalpyof'aporization,BTU/ibmfggistV(1--a)

(~/q=Poworgenerationinbundle,BTU/hr=(PF)(FCP)(ABTU)PF=bundleradialpowerfactorFCP~fractionalcorepowerrelativeto1850Hh'BTU=averagebundleoutputat1850Hft,BTU/hr3V=activecoolantvolume,fta.=voidfractionThereforeht='0.31)(P)(hf)(V)(1-a.)(ABTU)(PF)(FCP)Equation2"B"Factor=(1-a.)i(PF)(FCP)Equation3~tLimitingthis"B"factorrelatiorishipwillassurethatlocalpowervoidvalueswillnotresultindr@outtimesshorterthanthoseused.intheECCSAnalysis.UsingEquation2:"B"Factor=(ABTU)Qt)(0.31)(Pf)(hf)(V)fgEquation4Assumednominalvaluesare:ABTU=1.1869x10BTU/hr7pf~45.977ibm/ft3hf=641.36BTU/1bmfgV~1.2696ft,ZnitialCoreV=1.2948ft,Reloads1,2,33 r~~

V=1.2936ft,Reloads4,53SubstitutingtheabovevaluesinEquation4yieldsthe"B"factorrelatiori-shipsforthedifferentreloads:"B"Factor=(1022.688)(ht)"B"Factor=(1002.784)(ht)"B"Factor=(1003.714)(bt)2'nitialCoreReloads1,2,3Reloads4,5Equation5Equa,tion6Equation7Thefollovingexamplesshovhovdifferentvaluesof"B"verecalculatedfortvodifferentexposuresofthesamefuel(Reload3):~ExosureECCSAnalsisDroutTimesHAPLHGR50007fVD/T25000HVD/T1.48sec1.59sec10.689.92SunstitutingtheabovedryouttimesinEquation6yields:For5000IWD/T:"B"Factor=(1002.784)(ht)"B"Factor=1002.784lhr)(1.48sec)3600sec/hr"B"Factor=0.412For25000IWD/T:"B"Factor=(1002.784)gt)"B"Factor=(1002.784/hr)(1.59sec)3600sec/hr"B"Factor=0.443

e~eeest:Demonstratehow"B"valuesarecalculatedtoassureconservatismwhenusingthedryouttimesassumedintheECCSanalysis.R~esseeAsindicatedintheaboveresponse,nominalvalueswere.usedtocalculate,the"B"factors.ConvergedHApLHGRlimitsandconservativeaxialpowerdistributionswereassumedfort'edryouttime,determinations.'Inaddition,aconservativec4rrelation(G.E.compliancewith10CFR50,AppendixKcriteriaI.C.4:)wasusedwhichwaspreviouslyapprovedbytheCommission.A"B"FactorLimitingConditionforOperationisnotnecessarytoassurethatactualdryouttimesareconservative.DryouttimeisonlyoneofmanyconservativeinputsusedtodetermineHAPL/EGRlimits,theultimaterestrictionofinterest.Sensitivityanalysesperformedbyourfuelsupplierhavedeterminedthattheparametersusedtocalculatedryouttime(voidfraction,axialpowerdistributions)areconservativewhencomparedtonormalplantoperation.

~r~wy~

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